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Finding the Fourth Proportional to 1,537.86, 2,122.44 and 908.94

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Solution

The fourth proportional to 1,537.86, 2,122.44 and 908.94 is: 1,254.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,537.86 : 2,122.44 = 908.94 : x
  2. Step 2: Convert to fraction form
    1,537.86/2,122.44 = 908.94/x
  3. Step 3: Cross multiply
    1,537.86x = 2,122.44 × 908.94
  4. Step 4: Simplify right side
    1,537.86x = 1,929,170.61
  5. Step 5: Solve for x
    x = 1,929,170.61/1,537.86
  6. Step 6: Final answer
    x = 1,254.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.